Consider the five-story building shown in Figure P2.10. The average weights of the floor and roof are \(90 \mathrm{lb} / \mathrm{ft}^{2}\) and \(70 \mathrm{lb} / \mathrm{ft}^{2}\), respectively. The values of \(S_{D S}\) and \(S_{D 1}\) are equal to \(0.9 g\) and \(0.4 g\), respectively. Since steel moment frames are used in the north-south direction to resist the seismic forces, the value of \(R\) equals 8 . Compute the seismic base shear \(V\). Then distribute the base shear along the height of the building.

Figure P2.10

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B (U) (D) -5 @ 12'=60- 4 @ 25' 100' Plan (a) Building Section (b) 3 @ 30' 90'- 3 @ 20=60- -N 20 (c) 15 13 wind pressures in lb/ft